There have been a lot of word games (apps) lately and some use graphics but others use photographs and I was hoping that someone could explain how these games manage to get so many photos in an app without taking up huge amounts of memory?
The easiest example I can give is an app called '4 pics 1 word' it has over 350 levels and obviously 4 pics on each level and the photos are good quality on retina screens but the memory of the app is less than 40mb, if I have remembered correctly. I was curious as to how this works, is it each photo being optimized in photoshop (save for web and devices) (png or jpeg) or is it something to do with the code or something else?
I know this question is quite broad but any answers, help, links to anything would be greatly appreciated.